CN107021523B - A kind of orthorhombic phase α-MoO3The preparation method and its photocatalytic applications of nanobelt - Google Patents
A kind of orthorhombic phase α-MoO3The preparation method and its photocatalytic applications of nanobelt Download PDFInfo
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- CN107021523B CN107021523B CN201710044258.5A CN201710044258A CN107021523B CN 107021523 B CN107021523 B CN 107021523B CN 201710044258 A CN201710044258 A CN 201710044258A CN 107021523 B CN107021523 B CN 107021523B
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- 239000002127 nanobelt Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 11
- 229960000907 methylthioninium chloride Drugs 0.000 claims abstract description 18
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 10
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000015556 catabolic process Effects 0.000 claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 claims abstract description 5
- 238000007146 photocatalysis Methods 0.000 claims abstract description 5
- 229910001868 water Inorganic materials 0.000 claims abstract description 5
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 claims abstract 4
- 230000008878 coupling Effects 0.000 claims abstract 2
- 238000010168 coupling process Methods 0.000 claims abstract 2
- 238000005859 coupling reaction Methods 0.000 claims abstract 2
- 239000010919 dye waste Substances 0.000 claims abstract 2
- 229910003149 α-MoO3 Inorganic materials 0.000 claims description 25
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 description 32
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 17
- 239000000975 dye Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 229910003208 (NH4)6Mo7O24·4H2O Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910015667 MoO4 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/02—Oxides; Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/28—Molybdenum
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2004/01—Particle morphology depicted by an image
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- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C01P2004/17—Nanostrips, nanoribbons or nanobelts, i.e. solid nanofibres with two significantly differing dimensions between 1-100 nanometer
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- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
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Abstract
The present invention relates to a kind of orthorhombic phase α MoO3The preparation method and its photocatalytic applications of nanobelt, specifically pass through α MoO3The nanobelt methylene blue in high efficiency photocatalysis degradation of dye waste water at room temperature.α MoO of the present invention3Nanobelt is with hexagonal phase h MoO3Micron bar is presoma, by hydrothermal method synthesize, can effectively photocatalytic degradation concentration be 1 10mg/L methylene blue solution, removal efficiency 100%, no coupling product generation.
Description
Technical field
The present invention relates to orthorhombic phase α-MoO3The preparation method and its photocatalytic applications of nanobelt belong to the system of photochemical catalyst
Standby and application field.
Background technology
Orthorhombic phase α-MoO3It is most stable and most common MoO3Phase belongs to rhombic system, with [MoO6] it is basic structure list
Member by shared rib and apex angle, forms layer structure.Orthorhombic phase α-MoO3Unique crystal structure, makes it have excellent light
, electricity and catalytic performance have important answer in fields such as catalyst, sensor, electrochromic device and electrode of lithium cell
Use prospect.Nano-catalytic is recent studies suggest that α-MoO3The physicochemical properties of nano material and its pattern are closely related, therefore
Morphology controllable synthesis α-MoO3Material receives people and widely pays close attention to.
Chemical synthesis process due to process is simple, mild condition, it is efficient, of low cost the advantages that and as most main at present
The technology of preparing wanted.It is that morphology controllable synthesis molybdenum oxide is received using liquid-phase synthesis process, particularly hydro-thermal method or solvent-thermal method
Rice material is most easy, most efficient method.One kind is to form molybdic acid presoma using acidifying substance containing Mo, is further decomposed to form
One-dimentional structure α-MoO3.Such as：Li et al. is acidified Na using HCl2MoO4Solution adjusts pH value to 0.92, passes through 100 DEG C of hydro-thermal 12h
Length is synthesized as 0.7-7.5 μm, width is the α-MoO of 60nm3Nanobelt (Z.C.Li, et al., J.Mater.Chem.A,
2013, 48,15370-15376).Cao etc. uses HNO3It is acidified (NH4)6Mo7O24·4H2O to pH=1-3,180 DEG C of hydro-thermal 24-
36h is similarly obtained α-MoO3Nanometer rods pass through nitrate (KNO3、NaNO3、LaNO3、Ca(NO3)2) addition can regulate and control oxidation
The pattern (X.Cao, et al., J.Phys.Chem.B, 2006,110,2006-2012) of molybdenum nano material.Zhu etc. uses HNO3
It is acidified (NH4)6Mo7O24·4H2O has synthesized the α-MoO that width is 200-300nm by 180 DEG C of hydro-thermal 20h3Nanobelt (X.
Cao,et al.,J.Phys.Chem.B,2006,110,2006-2012).Another kind of is that peroxo-polymolybdic acid decomposes, main after decomposition
Form molybdenum oxide, it is considered to be a kind of efficient molybdenum oxide nano material synthetic technology.Such as：Qian etc. is by 30%H2O2Drop
It is added in the system of Mo powder and water, 140 DEG C of hydro-thermal 12h obtain width as 200-800nm, and thickness is about 30nm, and length is several
α-the MoO of micron3Nanobelt (Y.Qian, et al., Chem.Lett., 2006,35,962-963).Zhang etc. is by MoO3Dissolving
In 30% H2O2In, 170 DEG C of hydro-thermal 20-45h of solution of formation are obtained into width as 200-330nm, thickness is about 60-90nm,
Length is more than ten micron of α-MoO3Nanometer rods (T.Zhang, et al., J.Phys.Chem.C., 2007,111,2401-
2408).New route synthesis α-MoO are utilized on nanoscale at present3Nano material realizes the controllable modulation of size and pattern,
That then also studies is less.Therefore, orthorhombic phase α-MoO are realized3The preparation of catalyst and structure regulating, can high activity reality
Existing catalytic reaction.
Methylene blue, chemical name 3, double (dimethylamino) phenthazine -5- chlorides of 7-, are a kind of cationic alkali
Property dyestuff.Methylene blue is the industrial cationic organic dyestuff often used, be widely used in cotton, fiber crops, silk article, papermaking,
The industrial circles such as dyestuff.At present, the industries such as pulping and paper-making, chemical dyestuff, weaving generate the fuel waste water for largely including methylene.
Since methylene blue contains metastable aromatic molecules structure, it is difficult to by the microbial degradation in water, to ecological environment and people
Class, which exists, to be seriously endangered.Therefore, the wastewater treatment of the methylene blue containing organic dyestuff is to alleviating crisis of resource and improving human lives
Environment has important practical significance.Photocatalytic oxidation is using photosensitizer semiconductor under ultraviolet light irradiation, by valence band electricity
Son excitation transits to conduction band and generates hole, and so as to which the chromophoric group that oxidation reaction destroys dyestuff occur, dye molecule is degraded,
Ultimately generate CO2、H2O and inorganic salt and other material.Photocatalytic oxidation have degradation and decolorization thoroughly, do not cause secondary pollution etc. excellent
Point, having a extensive future in dye wastewater treatment.Currently used photochemical catalyst is TiO2、WO3、Fe2O3Deng, but on
Orthorhombic phase α-MoO3Removal of the material to methylene blue, then that also studies is less.Therefore, orthorhombic phase α-MoO are studied3Material is controllable
Synthesis and regulation and control, can high activity absorption methylene blue, have potential practical value.
In conclusion as conductor oxidate, orthorhombic phase α-MoO3Material is in light degradation methylene blue area research
It is fewer.The method of traditional synthesis molybdenum oxide is that molybdic acid hydrothermal decomposition and peroxo-polymolybdic acid decompose, with hexagonal phase h-MoO3To be preceding
Drive body hydrothermal synthesis α-MoO3Material not yet has been reported that.Therefore, orthorhombic phase α-MoO are synthesized by new path3Nanobelt makes it
The methylene blue being capable of in the catalytic elimination waste water from dyestuff of high activity.
The content of the invention：
The present invention is intended to provide a kind of synthesis orthorhombic phase α-MoO3The method of nanobelt and photocatalysis remove methylene blue
Application, realize nearly 100% removal rate.
Based on above-mentioned purpose, technical solution according to the present invention is as follows：
1) orthorhombic phase α-MoO3The preparation of nanobelt：0.3g h-MoO will be added in 50mL beakers3Micron bar and 15mL
Deionized water, after stirring evenly, by gained liquid be transferred to 50ml using polytetrafluoroethylene (PTFE) as the stainless steel cauldron of liner in 200
DEG C hydro-thermal process 12h, then cooled to room temperature, product obtain orthorhombic phase α-MoO through centrifuge washing, 50 DEG C of vacuum drying3
Nanobelt.
2) hexagonal phase h-MoO3The specific preparation process of micron bar is as follows：1.44g α-MoO are added in 50mL beakers3Particle and
11mL (30%) H2O2, 30 DEG C of stirrings are to dissolving, by 7g NaNO3It is added in the beaker of above-mentioned solution, after stirring evenly, by institute
Liquid be transferred to 50ml using polytetrafluoroethylene (PTFE) as the stainless steel cauldron of liner in 170 DEG C of hydro-thermal process 12h, it is then naturally cold
But to room temperature, product obtains hexagonal phase h-MoO through centrifuge washing, 50 DEG C of vacuum drying3Micron bar.
3) by orthorhombic phase α-MoO3Nanobelt catalyst is for photocatalytic degradation removal methylene blue reaction.Orthorhombic phase α-
MoO3For nanobelt in room temperature reaction 30min, methylene blue removal rate is 31%, reacts 45min, removal rate 37%, reaction 360
Min is up to 100%.
The invention has the advantages that：
1) hexagonal phase h-MoO is utilized3Micron bar is presoma.Hydrothermal synthesis orthorhombic phase α-MoO3Nanobelt is effectively opened up
Orthorhombic phase α-MoO are opened up3Preparation method, it is made no longer to be mainly limited to molybdic acid hydrothermal decomposition and peroxo-polymolybdic acid decomposing solution,
It and can morphology controllable synthesis orthorhombic phase α-MoO3。
2) orthorhombic phase α-MoO at room temperature3Nanobelt photocatalytic degradation methylene blue, realizes Methyl Thionine Chloride in Aqueous
Effectively removing, removal efficiency 100%.
3) present invention has the characteristics that environmental-friendly, process efficiency is high and its photocatalytic degradation is sufficiently stable.
Description of the drawings：
Fig. 1 is orthorhombic phase α-MoO3The characterization result of nanobelt, (a) XRD, (b) FT-IR and (c-d) electron microscopic picture.
Specific embodiment
The following example is used for further illustrating the present invention, but does not thereby limit the invention.
Hexagonal phase h-MoO3The specific preparation process of micron bar is as follows：1.44g orthorhombic phase α-MoO are added in 50mL beakers3Grain
Son and 11mL (30%) H2O2, 30 DEG C of stirrings are to dissolving, by 7g NaNO3It is added in the beaker of above-mentioned solution, after stirring evenly,
By gained liquid be transferred to 50ml using polytetrafluoroethylene (PTFE) as the stainless steel cauldron of liner in 170 DEG C of hydro-thermal process 12h, then
Cooled to room temperature, product obtain hexagonal phase h-MoO through centrifuge washing, 50 DEG C of vacuum drying3Micron bar.
Embodiment 1
Orthorhombic phase α-MoO3The preparation of nanobelt：0.3g hexagonal phases h-MoO will be added in 50mL beakers3Micron bar and
Gained liquid after stirring evenly, is transferred to 50ml using polytetrafluoroethylene (PTFE) as in the stainless steel cauldron of liner by 15mL deionized waters
In 200 DEG C of hydro-thermal process 12h, then cooled to room temperature, product through centrifuge washing, 50 DEG C of vacuum drying obtain orthorhombic phase α-
MoO3Nanobelt, a diameter of 150-430nm, length are 2.1-14.5 μm.
Embodiment 2-11
Material prepared by embodiment 1 is used for photocatalytic degradation Methyl Thionine Chloride in Aqueous.
Material in 50mg embodiments 1 is added to containing the 250mL that 100mL concentration is 1-10mg/L methylene blue solutions
In conical flask, 30min is handled in the dark to reach absorption/desorption equilibrium.By reaction system room temperature 300W under agitation
Xe light irradiations certain time (30-480min), reaction product take supernatant, spectrophotometer Perkin after centrifuging
Elmer Lambda 750 analyze its composition at a length of 664nm of maximum absorption wave.Reaction result is as follows.
1 orthorhombic phase α-MoO of table3The reaction result of nanobelt photocatalytic degradation Methyl Thionine Chloride in Aqueous
As can be seen from Table 1：Orthorhombic phase α-MoO3Nanobelt wastewater by photocatalysis dyestuff Methylene Blue organic matter,
When 30min, 45min, 60min, 90min, 120min, 180min, 480min are reacted when concentration is 10mg/L, removal efficiency is respectively
31%th, 37%, 45%, 60%, 80%, 87%, 100%.180min is reacted when concentration is 1mg/L, 2mg/L, 5mg/L, is taken off
Except rate is 100%.
Claims (3)
1. a kind of orthorhombic phase α-MoO3The preparation method of nanobelt, specifically passes through h-MoO3Micron bar is presoma, hydro-thermal
Synthesize α-MoO3Nanobelt, the α-MoO3Nanobelt at room temperature can be in high efficiency photocatalysis degradation of dye waste water methylene blue；It is orthogonal
Phase α-MoO3Nanobelt is made by following steps：By hexagonal phase h-MoO3Micron bar is placed on using polytetrafluoroethylene (PTFE) as the stainless of liner
In steel reaction kettle orthorhombic phase α-MoO are obtained in 200-250 DEG C of hydro-thermal process 2-24h3Nanobelt, width 150-430nm, length
For 2.1-14.5 μm.
2. according to the method for claim 1, it is characterised in that：
Hexagonal phase h-MoO3The specific preparation process of micron bar is as follows：By α-MoO3Particle is dissolved in H2O2, by NaNO3It is added to above-mentioned
In solution, by gained liquid be transferred to using polytetrafluoroethylene (PTFE) as the stainless steel cauldron of liner in 150-250 DEG C of hydro-thermal process 2-
For 24 hours, h-MoO is obtained3Micron bar.
3. according to the method described in claim 1 or 2, it is characterised in that：
Orthorhombic phase α-MoO3Nanobelt in 20-60 DEG C of photocatalysis 3-8h, can photocatalytic degradation concentration be 1-10mg/L methylene blue
Solution, removal efficiency 100%, no coupling product generate.
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